A culture medium with numerous complex chemical ingredients in unknown proportions is known as a/an:

What ingredient in MacConkey agar makes the medium differential for carbohydrate fermentation?

What component in mannitol salt agar is selective for Staphylococcus bacteria?

What culture medium is often used to selectively isolate Gram-negative and enteric bacteria?

What letter in the photograph below of inoculated Columbia CNA with 5% sheep blood agar illustrates beta hemolysis?

The following diagram represents a + starch hydrolysis test result. (Test Result: "halo"/clearing around bacteria after addition of iodine)   

The gas that is formed when sulfur is reduced by bacteria and is used to determine if sulfur has been reduced is:

α-amylase is an enzyme that can:

If indole is produced by bacteria in SIM medium it results from the hydrolysis of:

Which of the tubes with SIM medium in the photograph below contains bacteria that are motile +, indole -, and H₂S -?